Development of Engineering Methods for Calculating Seasonal Solar System of Hot-Water Supply

Purpose of research. The purpose of the research is to develop a simplified approach for the further algorithmization of a hot-water  supply solar collector calculation for seasonal operation of an individual residential building and designation of the main predicted values.

Methods. To achieve objectives, the approximate values of the main solar system of hot-water supply characteristics was determined, affecting the technical and economic indicators of the system and determining the mode of system operation, its comfort in use and maintenance - the efficiency of the solar installation, the total cost of water heating in the alternate heater, the temperature of the water in the storage tank according to the estimated number of operation days in months of solar system of hot-water supply maintenance. As a criterion for the system effectiveness, the replacement coefficient for the solar system of hot-water supply was adopted, i.e. the share of the hot-water supply heat load satisfied by the absorbed solar energy during the operation of the facility.

Results. A variant of the problem statement is proposed for developing an algorithm for calculating a solar water collector for hot-water supply in an individual residential building for operating conditions with a relatively low level of solar radiation intensity and the presence of low temperatures in winter, which creates significant difficulties during the year-round operation of the system and determines the seasonality of its operation. The developed method allows to calculate: the course of the water temperature in the storage tank, the total amount of heat used to prepare hot water due to the energy of solar radiation; the replacement and efficiency coefficients for the solar system of hot-water supply.

Conclusion. A universal equation is obtained that allows you to determine the main predicted parameters of the solar system for any mode of operation for solar system of hot-water supply.

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